code: def test_undefined(value: t.Any) -> bool:
      """Like :func:`defined` but the other way round."""
      return isinstance(value, Undefined)
  
imports: import operator
  import typing
  from collections import abc
  from numbers import Number
  from .runtime import Undefined
  from .utils import pass_environment
label_desc: Use image node_id 5 for calling a global function with example usage: test_undefined(value) and returns: isinstance